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    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
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  <body>
    <script>
      // arr = ["lili", "jack", "lucy"]
      // const arr = new Array("lili", "jack", "lucy");
      // const arr = new Array(1, 2, 3, 4);
      const arr = new Array(4); // arrlength=4

      console.log(arr);
    </script>
  </body>
</html>
